Home / 9,721.78-13,401.70-6,880.32

Finding the Fourth Proportional to 9,721.78, 13,401.70 and 6,880.32

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Solution

The fourth proportional to 9,721.78, 13,401.70 and 6,880.32 is: 9,484.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,721.78 : 13,401.70 = 6,880.32 : x
  2. Step 2: Convert to fraction form
    9,721.78/13,401.70 = 6,880.32/x
  3. Step 3: Cross multiply
    9,721.78x = 13,401.70 × 6,880.32
  4. Step 4: Simplify right side
    9,721.78x = 92,207,984.54
  5. Step 5: Solve for x
    x = 92,207,984.54/9,721.78
  6. Step 6: Final answer
    x = 9,484.68

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.